From 8b68c0a4137080874e95a80658a7220ebe08b60c Mon Sep 17 00:00:00 2001 From: Muchun Song <songmuchun@bytedance.com> Date: Mon, 15 Mar 2021 06:44:21 +0000 Subject: [PATCH] mm: memcontrol: fix slub memory accounting MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit stable inclusion from stable-5.10.20 commit cbb86d6a5db96b19c82078a62c54d128721d374f bugzilla: 50608 -------------------------------- [ Upstream commit 96403bfe50c344b587ea53894954a9d152af1c9d ] SLUB currently account kmalloc() and kmalloc_node() allocations larger than order-1 page per-node. But it forget to update the per-memcg vmstats. So it can lead to inaccurate statistics of "slab_unreclaimable" which is from memory.stat. Fix it by using mod_lruvec_page_state instead of mod_node_page_state. Link: https://lkml.kernel.org/r/20210223092423.42420-1-songmuchun@bytedance.com Fixes: 6a486c0ad4dc ("mm, sl[ou]b: improve memory accounting") Signed-off-by: Muchun Song <songmuchun@bytedance.com> Reviewed-by: Shakeel Butt <shakeelb@google.com> Reviewed-by: Roman Gushchin <guro@fb.com> Reviewed-by: Michal Koutný <mkoutny@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Chen Jun <chenjun102@huawei.com> Acked-by: Xie XiuQi <xiexiuqi@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- mm/slab_common.c | 4 ++-- mm/slub.c | 8 ++++---- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/mm/slab_common.c b/mm/slab_common.c index f9ccd5dc13f3..8d96679668b4 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -836,8 +836,8 @@ void *kmalloc_order(size_t size, gfp_t flags, unsigned int order) page = alloc_pages(flags, order); if (likely(page)) { ret = page_address(page); - mod_node_page_state(page_pgdat(page), NR_SLAB_UNRECLAIMABLE_B, - PAGE_SIZE << order); + mod_lruvec_page_state(page, NR_SLAB_UNRECLAIMABLE_B, + PAGE_SIZE << order); } ret = kasan_kmalloc_large(ret, size, flags); /* As ret might get tagged, call kmemleak hook after KASAN. */ diff --git a/mm/slub.c b/mm/slub.c index 071e41067ea6..7b378e2ce270 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3984,8 +3984,8 @@ static void *kmalloc_large_node(size_t size, gfp_t flags, int node) page = alloc_pages_node(node, flags, order); if (page) { ptr = page_address(page); - mod_node_page_state(page_pgdat(page), NR_SLAB_UNRECLAIMABLE_B, - PAGE_SIZE << order); + mod_lruvec_page_state(page, NR_SLAB_UNRECLAIMABLE_B, + PAGE_SIZE << order); } return kmalloc_large_node_hook(ptr, size, flags); @@ -4116,8 +4116,8 @@ void kfree(const void *x) BUG_ON(!PageCompound(page)); kfree_hook(object); - mod_node_page_state(page_pgdat(page), NR_SLAB_UNRECLAIMABLE_B, - -(PAGE_SIZE << order)); + mod_lruvec_page_state(page, NR_SLAB_UNRECLAIMABLE_B, + -(PAGE_SIZE << order)); __free_pages(page, order); return; } -- GitLab